Purolite announces it has released a web version of its proprietary softening calculator, Puredesign-Softening, to the general public. This calculator estimates the ion exchange resin requirements for softening of ground, potable, process and waste waters. The simple-to-use tool requires minimum input to estimate ion exchange resin requirements to soften water, provides a summary printout of the input data and calculated requirements and is available at no cost. The software can be accessed from the 'Company' dropdown menu. www.purolite.com